<template>
  <div class="app-container">
    <div class="filter-container">
      <el-input v-model="listQuery.name"
                placeholder="name"
                style="width: 200px"
                class="filter-item"
                @keyup.enter.native="handleFilter" />
      <el-select v-model="listQuery.state"
                 placeholder="状态"
                 clearable
                 class="filter-item"
                 style="width: 130px">
        <el-option v-for="item in calendarTypeOptions"
                   :key="item.key"
                   :label="item.display_name"
                   :value="item.key" />
      </el-select>
      <el-select v-model="listQuery.sort"
                 style="width: 140px"
                 class="filter-item"
                 @change="handleFilter">
        <el-option v-for="item in sortOptions"
                   :key="item.key"
                   :label="item.label"
                   :value="item.key" />
      </el-select>
      <el-button v-waves
                 class="filter-item"
                 type="primary"
                 icon="el-icon-search"
                 @click="handleFilter">
        搜索
      </el-button>
      <el-button class="filter-item"
                 style="margin-left: 10px"
                 type="primary"
                 icon="el-icon-edit"
                 @click="handleCreate">
        添加
      </el-button>
      <el-button v-waves
                 :loading="downloadLoading"
                 class="filter-item"
                 type="primary"
                 icon="el-icon-download"
                 @click="handleDownload">
        导出
      </el-button>
    </div>

    <el-table :key="tableKey"
              v-loading="listLoading"
              :data="list"
              border
              fit
              highlight-current-row
              style="width: 100%"
              @sort-change="sortChange">
      <el-table-column label="ID"
                       prop="id"
                       sortable="custom"
                       align="center"
                       width="80"
                       :class-name="getSortClass('id')">
        <template slot-scope="{ row }">
          <span>{{ row.id }}</span>
        </template>
      </el-table-column>
      <el-table-column label="用户名"
                       prop="name"
                       align="center"
                       width="80">
        <template slot-scope="{ row }">
          <span>{{ row.name }}</span>
        </template>
      </el-table-column>
      <el-table-column label="邮箱"
                       prop="email"
                       align="center"
                       width="230">
        <template slot-scope="{ row }">
          <span>{{ row.email }}</span>
        </template>
      </el-table-column>
      <el-table-column label="角色"
                       prop="auth"
                       align="center"
                       width="130">
        <template slot-scope="{ row }">
          <span>{{ row.auth ? "用户" : "管理员" }}</span>
        </template>
      </el-table-column>
      <el-table-column label="注册时间"
                       width="250px"
                       align="center">
        <template slot-scope="{ row }">
          <span>{{ row.createDate }}</span>
        </template>
      </el-table-column>
      <el-table-column label="状态"
                       class-name="status-col"
                       width="100">
        <template slot-scope="{ row }">
          <el-tag :type="row.state?'primary':'danger'"
                  disable-transitions>{{ row.state ? "正常" : "锁定" }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="操作"
                       align="center"
                       width="350"
                       class-name="small-padding fixed-width">
        <template slot-scope="{ row, $index }">
          <el-button type="primary"
                     size="mini"
                     @click="handleUpdate(row)">
            修改
          </el-button>
          <el-button v-if="row.status != 'deleted'"
                     size="mini"
                     type="danger"
                     @click="handleDelete(row, $index)">
            删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination v-show="total > 0"
                :total="total"
                :page.sync="listQuery.page"
                :limit.sync="listQuery.limit"
                @pagination="getList" />

    <el-dialog :title="textMap[dialogStatus]"
               :visible.sync="dialogFormVisible">
      <el-form ref="dataForm"
               :rules="rules"
               :model="temp"
               label-position="left"
               label-width="70px"
               style="width: 400px; margin-left: 50px">
        <el-form-item label="用户名"
                      prop="name">
          <el-input v-model="temp.name" />
        </el-form-item>
        <el-form-item label="邮箱"
                      prop="email">
          <el-input v-model="temp.email" />
        </el-form-item>
        <el-form-item label="角色">
          <el-select v-model="temp.auth"
                     class="filter-item"
                     placeholder="角色">
            <el-option v-for="item in authOptions"
                       :key="item.key"
                       :label="item.label"
                       :value="item.key" />
          </el-select>
        </el-form-item>
        <el-form-item label="状态">
          <el-select v-model="temp.state"
                     class="filter-item"
                     placeholder="状态">
            <el-option v-for="item in stateOptions"
                       :key="item.key"
                       :label="item.label"
                       :value="item.key" />
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer"
           class="dialog-footer">
        <el-button @click="dialogFormVisible = false"> 关闭 </el-button>
        <el-button type="primary"
                   @click="dialogStatus === 'create' ? createData() : updateData()">
          提交
        </el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import {
  fetchList,
  fetchPv,
  createArticle,
  updateArticle,
  delUser
} from "@/api/article";
import waves from "@/directive/waves"; // waves directive
import { parseTime } from "@/utils";
import Pagination from "@/components/Pagination"; // secondary package based on el-pagination

const calendarTypeOptions = [
  { key: true, display_name: "正常" },
  { key: false, display_name: "锁定" },
  // { key: "JP", display_name: "Japan" },
  // { key: "EU", display_name: "Eurozone" },
];

// arr to obj, such as { CN : "China", US : "USA" }
const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
  acc[cur.key] = cur.display_name;
  return acc;
}, {});

export default {
  name: "User",
  components: { Pagination },
  directives: { waves },
  filters: {
    statusFilter (status) {
      const statusMap = {
        published: "success",
        draft: "info",
        deleted: "danger",
      };
      return statusMap[status];
    },
    typeFilter (type) {
      return calendarTypeKeyValue[type];
    },
  },
  data () {
    return {
      tableKey: 0,
      list: null,
      total: 0,
      listLoading: true,
      listQuery: {
        page: 1,
        limit: 20,
        importance: undefined,
        title: undefined,
        type: undefined,
        sort: "+id",
      },
      importanceOptions: [1, 2, 3],
      calendarTypeOptions,
      sortOptions: [
        { label: "ID 正序", key: "+id" },
        { label: "ID 倒序", key: "-id" },
      ],
      authOptions: [
        { label: "管理员", key: "0" },
        { label: "用户", key: "1" },
      ],
      stateOptions: [
        { label: "正常", key: true },
        { label: "锁定", key: false },
      ],
      showReviewer: false,
      temp: {
        id: undefined,
        importance: 1,
        remark: "",
        timestamp: new Date(),
        title: "",
        type: "",
        status: "published",
      },
      dialogFormVisible: false,
      dialogStatus: "",
      textMap: {
        update: "Edit",
        create: "Create",
      },
      pvData: [],
      rules: {
        type: [
          { required: true, message: "type is required", trigger: "change" },
        ],
        timestamp: [
          {
            type: "date",
            required: true,
            message: "timestamp is required",
            trigger: "change",
          },
        ],
        title: [
          { required: true, message: "title is required", trigger: "blur" },
        ],
      },
      downloadLoading: false,
    };
  },
  created () {
    this.getList();
  },
  methods: {
    getList () {
      this.listLoading = true;
      fetchList(this.listQuery).then((response) => {
        this.list = response.data.items;
        this.total = response.data.total;

        // Just to simulate the time of the request
        setTimeout(() => {
          this.listLoading = false;
        }, 1.5 * 1000);
      });
    },
    handleFilter () {
      this.listQuery.page = 1;
      this.getList();
    },
    handleModifyStatus (row, status) {
      this.$message({
        message: "操作Success",
        type: "success",
      });
      row.status = status;
    },
    sortChange (data) {
      const { prop, order } = data;
      if (prop === "id") {
        this.sortByID(order);
      }
    },
    sortByID (order) {
      if (order === "ascending") {
        this.listQuery.sort = "+id";
      } else {
        this.listQuery.sort = "-id";
      }
      this.handleFilter();
    },
    resetTemp () {
      this.temp = {
        id: undefined,
        importance: 1,
        remark: "",
        timestamp: new Date(),
        title: "",
        status: "published",
        type: "",
      };
    },
    handleCreate () {
      this.resetTemp();
      this.dialogStatus = "create";
      this.dialogFormVisible = true;
      this.$nextTick(() => {
        this.$refs["dataForm"].clearValidate();
      });
    },
    createData () {
      this.$refs["dataForm"].validate((valid) => {
        if (valid) {
          this.temp.id = parseInt(Math.random() * 100) + 1024; // mock a id
          this.temp.author = "vue-element-admin";
          createArticle(this.temp).then(() => {
            this.list.unshift(this.temp);
            this.dialogFormVisible = false;
            this.$notify({
              title: "成功",
              message: "添加成功",
              type: "success",
              duration: 2000,
            });
          });
        }
      });
    },
    handleUpdate (row) {
      this.temp = Object.assign({}, row); // copy obj
      this.temp.timestamp = new Date(this.temp.timestamp);
      this.dialogStatus = "update";
      this.dialogFormVisible = true;
      this.$nextTick(() => {
        this.$refs["dataForm"].clearValidate();
      });
    },
    updateData () {
      this.$refs["dataForm"].validate((valid) => {
        if (valid) {
          const tempData = Object.assign({}, this.temp);
          // tempData.timestamp = +new Date(tempData.timestamp); // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
          updateArticle(tempData).then(() => {
            const index = this.list.findIndex((v) => v.id === this.temp.id);
            this.list.splice(index, 1, this.temp);
            this.dialogFormVisible = false;
            this.$notify({
              title: "Success",
              message: "Update Successfully",
              type: "success",
              duration: 2000,
            });
          });
        }
      });
    },
    handleDelete (row, index) {
      delUser({ 'id': row.id }).then(() => {
        this.$notify({
          title: "成功",
          message: "删除成功",
          type: "success",
          duration: 2000,
        })
        this.list.splice(index, 1);
      }
      )

    },
    handleDownload () {
      this.downloadLoading = true;
      import("@/vendor/Export2Excel").then((excel) => {
        const tHeader = ["id", "用户名", "注册时间", "邮箱", "角色", "状态"];
        const filterVal = [
          "id",
          "name",
          "createDate",
          "email",
          "auth",
          "state",
        ];
        const data = this.formatJson(filterVal);
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: "table-list",
        });
        this.downloadLoading = false;
      });
    },
    formatJson (filterVal) {
      return this.list.map((v) =>
        filterVal.map((j) => {
          if (j === "timestamp") {
            return parseTime(v[j]);
          } else {
            return v[j];
          }
        })
      );
    },
    getSortClass: function (key) {
      const sort = this.listQuery.sort;
      return sort === `+${key}` ? "ascending" : "descending";
    },
  },
};
</script>
